Spectra FOCUS 35

The FOCUS 35 is a motorized total station providing high speed, accuracy and precision in measurement. The FOCUS 35 robotic instrument moves the power of the observer from the instrument to the range pole, improving efficiency. The speed of observation and precise positioning of the FOCUS 35 Robotic Total Station is provided by patented StepDrive™ motion technology, which controls the horizontal and vertical motion of the motors, eliminating the need for traditional motion locks. The FOCUS 35 includes a tracking sensor that uses LockNGo™ FastTrack tracking technology, enabling the instrument to constantly lock onto the prism.The FOCUS 35 RX extended operation models feature market-leading battery life.

The FOCUS 35 is available in 1”, 2”, 3” or 5” accuracies and is controlled by the Spectra Geospatial Survey Pro™ field software using an onboard Windows CE touchscreen interface. The FOCUS 35 is also designed to be controlled externally by Ranger™, Nomad™, or T41® data collectors running Survey Pro field software, Layout Pro or FAST Survey on the Ranger or Nomad. Alternatively, bring your own controller and connect to the FOCUS 35 using Bluetooth or the SPDL Radio Bridge.

The FOCUS 35 is available in three models:

Robotic
LockNGo
RX

All models include a motorized drive system at the instrument, and a tracking sensor to track the range pole and prism.

PERFORMANCE
Angle measurement
Accuracy
(Standard deviation based on ISO 17123-3) 1" (0.3 mgon), 2" (0.6 mgon), 3" (1.0 mgon), or 5" (1.5 mgon)
Angle reading (least count display)
Standard 1" (0.3 mgon)
1" model 0.5" (0.15 mgon)
Tracking 2" (0.6 mgon)

Distance measurement1
Accuracy to Prism
(Standard deviation based on ISO 17123-4)
Standard 2 mm + 2 ppm (0.007 ft + 2 ppm)
Tracking 5 mm + 2 ppm (0.016 ft + 2 ppm)
Accuracy Reflectorless Mode
Standard
<300 m (984 ft) 3 mm + 2 ppm (0.01 ft + 2 ppm)
Standard
>300 m (984 ft) 5 mm + 2 ppm (0.016 ft + 2 ppm)
Tracking 10 mm + 2 ppm (0.033 ft + 2 ppm)
Measuring time
Prism Standard 2.4 sec.
Prism Tracking 0.5 sec.
Reflectorless Standard 3–15 sec.
Reflectorless Tracking 0.7 sec.
Range Prism Mode
1 prism 4000 m (13,123 ft)
3 prisms 7000 m (22,966 ft)
Foil Reflector 60 mm 300 m (984 ft)
Range Reflectorless Mode
Good3 Normal4 Difficult5
KGC2 (18%) 400 m
(1,312 ft) 350 m
(1,148ft) 300 m
(984 ft)
KGC (90%) 800 m
(2,625 ft 600 m
(1,969 ft) 400 m
(1,312 ft)
Foil Reflector
60 mm 1,000 m
(3,280 ft) 1,000 m
(3,280 ft) 800 m
(2,625 ft)
Shortest possible range 1.5 m (4.9 ft)
Automatic level compensator
Type dual-axis
Accuracy 0.5" (0.15 mgon)
Working Range .±5.5' (±100 mgon)

EDM SPECIFICATIONS
EDM Laser and Principle
Light source Laser Diode 660 nm
Principle Phase Shift
EDM Beam divergence
Horizontal 4 cm/100 m (0.13 ft/328 ft)
Vertical 3 cm/100 m (0.10 ft/328 ft)
Atmospheric Correction –150 ppm to 160 ppm continuously

GENERAL SPECIFICATIONS
Coarse Leveling
Electronic coarse leveling range ±3° (±3.3 gon)
Circular level in tribrach 8'/2 mm (8'/0.007 ft)
Drives
Drive system Spectra Precision® StepDrive™ system
Rotation time maximum 90º/sec (100 gon/sec)
Rotation time Face 1 to Face 2 3.7 sec.
Positioning time180º (200 gon) 3.5 sec.
Clamps and slow motions StepDrive driven, endless fine adjustment
Centering
Centering system 3-pin
Plummet Built-in optical plummet
Magnification 2.4 x
Focusing distance 0.5 m to ∞ (1.6 ft to ∞)
Telescope
Magnification 31x
Aperture 50 mm (1.96 in)
Field of view 1º30’
Focusing distance 1.5 m to ∞ (4.9 ft to ∞)
Illuminated crosshair Standard
Tracklight built in Standard
Trunnion axis height 196 mm (7.71 in)
Environmental
Operating temperature –20 ºC to +50 ºC (–4 ºF to +122 ºF)
Dust and water proofing IP55
Power supply
Internal battery Li-Ion, 11.1 V/5.0 Ah
Operating time with one internal battery Approx. 6 hours
Communications
External foot connector USB cable connection and external power supply
Wireless communication Bluetooth®
Weight
Instrument 5.0 kg (11.0 lb)
Tribrach 0.7 kg (1.54 lb)
Internal battery 0.3 kg (0.66 lb)

ROBOTIC SPECIFICATION
Robotic Operation1
Maximum Robotic Range 300 m to 800 m (984 ft to 2,625 ft)
Point precision at 200 m (656 ft) <2 mm (0.007 ft)
Maximum Search Distance 300 m to 800 m (984 ft to 2,625 ft)
Search Time (typical) 2–10 sec.
Communications
internal/external 2.4 GHz, frequency hopping, spread spectrum
GPS Search GeoLock6
GPS Search GeoLock™ 360º (400 gon)
Range Full robotic operation range

DATA COLLECTION
Control Units fixed on alidade
Face 1
Display 3.5" TFT color touch screen, 320x240 Pixel, backlight
Keyboard Alphanumeric keypad
Memory (data storage) 128 MB RAM, 1 GB Flash
Field App. Software Survey Pro and Layout Pro
Face 2
Display 6 lines, monochrome, 96x49 Pixel, backlight
Keyboard 4 keys
Instrument Software Functions Change Face, Radio and Instrument Settings, Measurement Value Display, Leveling